1,2
Diagonal of A219421
Table of n, a(n) for n=1..10.
Some solutions for n=3
..1..1..0....0..0..0....1..1..0....0..0..1....0..0..0....0..0..1....0..0..0
..0..0..0....0..1..0....0..0..0....1..1..1....1..0..1....0..0..1....1..0..1
..1..0..1....0..0..1....0..1..1....1..0..0....1..1..1....1..0..0....0..0..0
Sequence in context: A346464 A197484 A218835 * A220405 A109304 A134113
Adjacent sequences: A219414 A219415 A219416 * A219418 A219419 A219420
nonn
R. H. Hardin Nov 19 2012
approved